Melt Electrowriting of Amphiphilic Physically Crosslinked Segmented Copolymers

Various (AB)n and (ABAC)n segmented copolymers with hydrophilic hydrophobic segments are processed via melt electrowriting (MEW). Two different composed of bisurea poly(dimethyl siloxane) (PDMS) or poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide) (PPO-PEG-PPO) segments, while the amphiphilic consist in combination PDMS PPO-PEG-PPO ratios, explored. All copolymer compositions using same conditions, including nozzle temperature, applied voltage, collector distance, changes pressure speed altered fiber diameter range 7 60 µm. showed excellent processability MEW, well-controlled stacking, inter-layer bonding. Notably, surfaces all four fibers very smooth when visualized scanning electron microscopy. However, show roughness demonstrated atomic force The non-cytotoxic increased L929 fibroblast attachment increasing content result a spectrum physical properties.